[R-390] R392 audio

[Charles Steinmetz]

W. Li wrote:

>There are many LMxxx and classD amps out there. As Bernie and Perry 
>have noted, these draw little current, and their audio output is phenomenal.

As I said previously, the audio quality of such devices is fine for 
lo-fi applications like communications radios.  However, the 
limitations of integrated construction place significant constraints 
on their circuitry and operation.  They cannot perform in the same 
league with discrete designs and, as I said previously, for that 
reason they are not used even in decent mid-fi products.  Perfectly 
adequate (and well-suited) to communications audio and other 
non-demanding applications.  But no better than mediocre by any hi-fi 
standard, and certainly not "high end" or "phenomenal" in terms of 
sound quality.

Best regards,

Charles